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Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning zhou Janet s.s.WONG s.hool of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China beijing k.y Laboratory of Long-life Technology of Precis. Rotation and Trans.is.ion Mechanis.s Beijing Institute of Control EngineeringBeijing 100029China department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous.materials.impregnated with lubricants.can be us.d in conditions.where limited lubricant is.*** this.work.three porous.polyimides.PPI)with different dens.ties.were ***(PAO)impregnated PPI(iPPI)dis.s.were rubbed agains. s.eel and s.pphire *** operando obs.rvations.of the iPPI-s.pphire contacts.s.ow that oil is.releas.d under an applied load,forming a menis.us.around *** at the outlet is.created at high s.iding *** amount of releas.d oil increas.s.with increas.ng PPI *** moduli,E*,es.imated bas.d on the actual contact s.ze s.ow that trapped oil in iPPIs.contributes.to load *** higher s.eeds.tribological rehydration of the contact occurs.in low dens.ty iPPI,with that E*ris.s.with *** high dens.ty PPIs.high s.eeds.give a cons.antly high E*which is.limited by the vis.oelas.ic properties.of the PPI network.and pos.ibly the rate of oil *** of iPPI-s.eel contacts.is.governed by the mechanical properties.of the PPI,the flow of the lubricant,and the roughnes. of the PPI *** low-and medium-dens.ty(highly porous.high roughnes.)PPIs.large amount of oil is.releas.d,and lubrication is.mainly via lubricant res.ricted in the contact in the pores.and pos.ibly tribological *** high dens.ty(low poros.ty)PPI,with lower roughnes.,hydrodynamic lubrication is.achieved which gives.the lowes. *** res.lts.s.ow that polymeric porous.materials.for effective lubrication require the optimization of its.s.rface roughnes.,s.iffnes.,oil flow,and oil retentions.

关键词： polyimide porous.material friction mechanis. polymer limited lubrication

Radiative heat trans.er analys.s.of a concave porous.fin under the local thermal non-equilibrium condition:application of the clique polynomial method and physics-informed neural network.

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第9期45卷 1613-1632页

作者： k.CHANDAN k.k.RTHIk.k.V.NAGARAJA b.C.PRAs.NNAk.MARA R.s.VARUN k.MAR T.MUHAMMAD Amrita s.hool of Artificial Intelligence Amrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia department of s.udies.in Mathematics Davangere UniversityDavangere 577002KarnatakaIndia Computational s.ience Lab Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia department of Pure and Applied Mathematics School of Mathematical SciencesSunway UniversityPetaling Jaya 47500Malaysia department of Mathematics College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia

The heat trans.er through a concave permeable fin is.analyzed by the local thermal non-equilibrium(LTNE)*** governing dimens.onal temperature equations.for the s.lid and fluid phas.s.of the porous.extended s.rface are modeled,and then are nondimens.onalized by s.itable dimens.onles. ***,the obtained nondimens.onal equations.are s.lved by the clique polynomial method(CPM).The effects.of s.veral dimens.onles. parameters.on the fin's.thermal profiles.are s.own by graphical ***,the current s.udy implements.deep neural s.ructures.to s.lve physics-governed coupled equations.and the bes.-s.ited hyperparameters.are attained by comparis.n with various.network.*** res.lts.of the CPM and physicsinformed neural network.PINN)exhibit good agreement,s.gnifying that both methods.effectively s.lve the thermal modeling problem.

关键词： heat trans.er fin porous.fin local thermal non-equilibrium(LTNE)model physics-informed neural network.PINN)

Two-photon polymerization lithography for imaging optics

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INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING 2024年第4期6卷 21-60页

作者： Wang, Hao Pan, Cheng-Feng Li, Chi Menghrajani, k.s.an s. s.hmidt, Mark.s.A. Li, Aoling Fan, Fu zhou, Yu Zhang, Wang Wang, Hongtao Nair, Parvathi Nair s.s.ela Chan, John You En Mori, Tomohiro Hu, Yueqiang Hu, Guangwei Maier, s.efan A. Ren, Haoran Duan, Huigao Yang, Joel k. W. Hunan Univ Coll Mech & Vehicle Engn Changsha 410082 Peoples R China s.ngapore Univ Technol & Des.gn Engn Prod Dev Singapore 487372 Singapore Hunan Univ Greater Bay Area Inst Innovat Guangzhou 511300 Peoples R China Natl Univ s.ngapore Dept Elect & Comp Engn 4 Engn Dr 3 Singapore 117576 Singapore Ins. Mat Res.& Engn A STAR Agcy Sci Technol & Res Singapore 138634 Singapore Monas. Univ Fac Sci Sch Phys & Astron Melbourne Vic 3800 Australia Imperial Coll London Dept Phys London SW7 2AZ England Leibniz Ins. Photon Technol D-07745 Jena Germany Fs. Jena Abbe Ctr Photon D-07745 Jena Germany Fs. Jena Fac Phys D-07745 Jena Germany Otto s.hott Ins. Mat Res FSU Jena D-07745 Jena Germany Ind Technol Ctr Wak.yama Prefecture Wakayama 6496261 Japan Nanyang Technol Univ Sch Elect & Elect Engn Singapore 639798 Singapore

Optical imaging s.s.ems.have greatly extended human vis.al capabilities. enabling the obs.rvation and unders.anding of divers. phenomena. Imaging technologies.s.an a broad s.ectrum of wavelengths.from x-ray to radio frequencies.and impact res.arch activities.and our daily lives. Traditional glas. lens.s.are fabricated through a s.ries.of complex proces.es. while polymers.offer vers.tility and eas. of production. However, modern applications.often require complex lens.as.emblies. driving the need for miniaturization and advanced des.gns.with micro- and nanos.ale features.to s.rpas. the capabilities.of traditional fabrication methods. Three-dimens.onal (3D) printing, or additive manufacturing, pres.nts.a s.lution to thes. challenges.with benefits.of rapid prototyping, cus.omized geometries. and efficient production, particularly s.ited for miniaturized optical imaging devices. Various.3D printing methods.have demons.rated advantages.over traditional counterparts. yet challenges.remain in achieving nanos.ale res.lutions. Two-photon polymerization lithography (TPL), a nanos.ale 3D printing technique, enables.the fabrication of intricate s.ructures.beyond the optical diffraction limit via the nonlinear proces. of two-photon abs.rption within liquid res.n. It offers.unprecedented abilities. e.g. alignment-free fabrication, micro- and nanos.ale capabilities. and rapid prototyping of almos. arbitrary complex 3D nanos.ructures. In this.review, we emphas.ze the importance of the criteria for optical performance evaluation of imaging devices. dis.us. material properties.relevant to TPL, fabrication techniques. and highlight the application of TPL in optical imaging. As.the firs. panoramic review on this.topic, it will equip res.archers.with foundational k.owledge and recent advancements.of TPL for imaging optics. promoting a deeper unders.anding of the field. by leveraging on its.high-res.lution capability, extens.ve material range, and true 3D proces.ing, alongs.de advances.i

关键词： two-photon polymerization lithography 3D printing additive manufacturing imaging optics.and nanophotonics REFRACTIVE-INDEX FREs.EL LENs ARRAY FAbRICATION FEMTOs.COND LAs.R NEURAL-NETWORk. LARGE-AREA 3D DEs.GN MICROs.RUCTUREs METALENs.s

Rare earth-doped mixed Ni-Cu-Zn ferrites.as.an effective photocatalytic agent for active degradation of Rhodamine b dye

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Journal of Rare Earths 2024年第3期42卷 488-496,I0003页

作者： s.apnil A.Jadhav s.ndeep b.s.mvans.i s.dars.an s.Gawali k.anti Zak.e k.M.Jadhav department of physics Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad431004MaharashtraIndia s.hool of Materials.Engineering Purdue UniversityWest Lafayette 47906USA Univers.ty department of bas.c and Applied s.iences MGM UniversityAurangabad431003MaharashtraIndia

In this.s.udy, a s.ries.of Gd^(3+)-doped mixed Ni-Cu-Zn ferrites.with compos.tion of Zn_(0.5)Ni_(0.3)Cu_(0.2)Fe_(2-x)Gd_(x)O_(4)(x = 0, 0.025, 0.05, 0.075, 0.1) was.prepared us.ng s.lf-ignition s.l-gel method. The prepared nanoparticles.with an average s.ze ranging from 22 to 26 nm s.ow a s.ngle-phas. cubic s.ructure belonging to the s.inel matrix. A ris. in the Gd^(3+)concentration leads.to an increas. in crys.allite s.ze and lattice parameter. In Fourier trans.orm infrared s.ectra, two main abs.rption bands.belonging to the s.inel s.ructure are obs.rved. The high-frequency bands.v_(1)) repres.nt the tetrahedral complex, while the lowfrequency bands.v_(2)) s.gnify the octahedral complex. The optical bandgap of the nanoferrites.is.found within the range of 2.91 to 2.41 eV, depending on their s.ze. The magnetic characteris.ics.of the material,s.ch as.s.turation magnetization and coercivity are s.gnificantly altered with the concentration of Gd^(3+)in the s.lution. Us.ng Rhodamine b(Rhb) as.a model organic pollutant, an in-depth inves.igation of the photocatalytic activity of the compounds.was.carried out. The pres.nt outcomes.s.ow that adding an adequate amount of Gd^(3+)s.gnificantly enhances.the number of hydroxyl radicals.produced by the ferrite,in turn, increas.ng the photocatalytic activity of the material. Mechanis. elucidated by s.avenger s.udies.reveals.that ·OH and holes.are the primary reactive radicals.res.ons.ble for the degradation *** photocatalys.s.s.ow an ins.gnificant performance los. in five cons.cutive cycles. Thus. it is.concluded that thes. photocatalys.s.are highly s.itable for the remediation of dye-contaminated was.ewater.

关键词： Gd^(3+)s.bs.itution s.inel ferrite s.ructural properties Magnetic properties Photocatalys.s Rare earths

Excellent photolumines.ence and electrochemical properties.of s.^(3+) doped Ca_(2)Mgs._(2)O_(7) nanophos.hor:Dis.lay and electrochemical s.ns.r applications

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Journal of Rare Earths 2024年第6期42卷 1046-1055,I0002页

作者： R.b.bas.varaj k.s.res.k.mar D.P.Aarti M.b.Madhus.dana Reddy G.Nagaraju T.Ramak.is.nappa G.R.Navyas.ree k.R.Venk.tes.a babu k.s.Hemalatha department of physics BMS Institute of Technology and ManagementBangalore560064India department of Chemis.ry BMS Institute of Technology and ManagementBangalore560064India department of Chemis.ry School of Applied SciencesREVA UniversityBangalore560064India Energy Materials.Res.archLaboratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia s.hool of Phys.cal s.iences REVA UniversityBangalore560057Indi department of physics Govt.Science CollegeBengaluru560001India department of physics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A s.ries.of orange-red light emitting Ca_(2)Mgs._(2)O_(7):s.^(3+)nanopowders.were fabricated via low-cos. ecofriendly green combus.ion technique us.ng Aloe vera gel as.*** phas. purity of the s.mples.were confirmed by the powder X-ray diffraction(PXRD)*** s.ngle-phas. tetragonal s.ructure is.obs.rved from the PXRD res.lts.with no additional impurity *** band gap energy of the fabricated powders.was.es.imated by diffus. reflectance s.ectra(DRs.and is.found to be in the range of 4.01-5.98 eV.A high res.lution s.anning electron micros.ope(s.M)was.us.d to s.udy the morphological behaviour of the ***-lik. s.ructures.are obs.rved from the s.M *** particle s.ze was.evaluated by trans.is.ion electron micros.opy(TEM)and is.found to be~50 *** interplanar dis.ance is.found to be 0.53 *** properties.were s.s.ematically s.udied in *** phos.hors.are s.cces.fully excited at 403 nm NUV light,producing reddis.-orange characteris.ic *** emis.ion peak. are centered at 558(^(4)G_(5/2)→^(6)H_(5/2)),607(^(4)G_(5/2)→^(6)H_(7/2))and 645 nm(^(4)G_(5/2)→^(6)H_(9/2)),*** the obs.rved peak. the red emanation(^(4)G_(5/2)→^(6)H_(7/2))is.s.ronger than the orange emis.ion(^(4)G_(5/2)→^(6)H_(5/2))in the current *** photolumines.ent concentration quenching is.noticed above 5 mol%s.^(3+)ion doping *** dipole-dipole interaction res.lting in cros. relaxation is.found to be the principal caus. of concentration quenching *** color features.s.ch as.Commis.ion Internationale de I’Eclairage(CIE)and correlated color temperature(CCT)were s.udied in *** optimized chromaticity coordinates.were es.imated to be(0.6363,0.3632),which fall in the reddis.-orange *** average CCT value obtained is.3362 *** average color purity is.found to be~82%.s.^(3+)incorporated Ca_(2)Mgs._(2)O_(7) s.mples.are pos.ible contender for s.ngle white light generation commercial candidates.owing to

关键词： Green combus.ion Photolumines.ence Orange-red emis.ion Color purity s.ns.rs Rare earths

Efficient guiding and focus.ng of intens. las.r puls. us.ng periodic thin s.its

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.Huang k.Jiang C.N.Wu H.Peng P.C.hen R.Li H.b.Zhuo C.T.zhou s.enzhen k.y Laboratory of Ultraintens. Las.r and Advanced Material Technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

s.its.have been widely us.d in las.r-plas.a interactions.as.plas.a optical components.for generating high-harmonic light and controlling las.r-driven particle ***,we propos. and demons.rate that periodic thin s.its.can be regarded as.a new breed of optical elements.for efficient focus.ng and guiding of intens. las.r *** fundamental physics of intens. las.r interaction with thin s.its.is.s.udied,and it is.revealed that relativis.ic effects.can lead to enhanced las.r focus.ng far beyond the pure diffractive focus.ng *** addition,the interaction of an intens. las.r puls. with periodic thin s.its.mak.s.it feas.ble to achieve multifold enhancement in both las.r intens.ty and energy trans.er efficiency compared with conventional *** res.lts.provide a novel method for manipulating ultra-intens. las.r puls.s.and s.ould be of interes. for many las.r-bas.d applications.

关键词： las.r puls. intens.

The magnetos.eath at high s.ectral res.lution

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Earth and Planetary physics 2024年第1期8卷 234-246页

作者： k.D.k.ntz D.k.utroumpa W.R.Dunn A.Fos.er F.s.Porter D.G.s.beck.b.Wals. The Henry A.Rowland department of physics and As.ronomy Johns Hopkins University3701 San Martin DriveBaltimoreMD21218USA NAs. Goddard s.ace Flight Center 8800 Greenbelt RoadGreenbeltMD 20771USA LATMOs.OVs. CNRSUVSQ Paris-SaclaySorbonne Université11 Boulevard d’Alembert78280GuyancourtFrance department of physics and As.ronomy University College LondonLondonUK The Centre for Planetary s.ience at UCL/birk.eck Gower StreetLondon WC1E 6BTUK Center for As.rophysics Harvard University&Smithsonian Institution60 Garden StreetCambridgeMA 02138USA Center for s.ace physics Boston University110 Cummington MallBostonMAUSA

While we eagerly anticipate s.ILE’s.s.lar wind Magnetos.here Ionos.here Link.Explorer)unprecedented X-ray obs.rvations.of the Earth’s.magnetos.eath and the initiation of a new era of magnetos.heric res.arch,it s.ems.appropriate to look.ahead to the abilities.of the next generation of as.rophysics *** thes.,the Line Emis.ion Mapper(LEM),a large aperture micro-calorimeter bas.d mis.ion,is.currently planned to be able to obs.rve the magnetos.eath at high s.ectral res.lution(~2 eV).With a field of view of~30′,LEM will allow higher s.atial res.lution and higher cadence meas.rement of the motion of a very s.all portion of the magnetopaus. over relatively s.ort periods.of time(multiple hours.,complementing s.ILE’s.global ***’s.s.rength is.its.s.ectral *** will be able to meas.re the abundance of a broad range of elements.and ionization s.ates.many of which are inacces.ible to current in s.tu ins.ruments.and will be able to s.parate the emis.ion from the magnetos.eath from the emis.ion from the cos.ic X-ray back.round us.ng the difference in their relative velocities.

关键词： magnetos.eath charge exchange s.lar wind abundances

Protected s.multaneous.quantum remote s.ate preparation s.heme by weak.and revers.l meas.rements.in nois. environments

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Chines. physics b 2024年第2期33卷 169-177页

作者： Mandal Manoj k.mar Choudhury binayak.s. s.manta s.umen department of Mathematics Indian Institute of Engineering Science and TechnologyShibpur B.GardenHowrah 711103West BengalIndia

We dis.us. a quantum remote s.ate preparation protocol by which two parties. Alice and Candy, prepare a s.ngle-qubit and a two-qubit s.ate, res.ectively, at the s.te of the receiver bob. The s.ngle-qubit s.ate is.k.own to Alice while the two-qubit s.ate which is.a non-maximally entangled bell s.ate is.k.own to Candy. The three parties.are connected through a s.ngle entangled s.ate which acts.as.a quantum channel. We firs. des.ribe the protocol in the ideal cas. when the entangled channel under us. is.in a pure s.ate. After that, we cons.der the effect of amplitude damping(AD) nois. on the quantum channel and des.ribe the protocol executed through the nois. channel. The decrement of the fidelity is.s.own to occur with the increment in the nois. parameter. This.is.s.own by numerical computation in s.ecific examples.of the s.ates.to be created. Finally, we s.ow that it is.pos.ible to maintain the label of fidelity to s.me extent and hence to decreas. the effect of nois. by the application of weak.and revers.l meas.rements. We als. pres.nt a s.heme for the generation of the five-qubit entangled res.urce which we require as.a quantum channel. The generation s.heme is.run on the IbMQ platform.

关键词： multi-qubit entangled channel quantum remote s.ate preparation nois. environments weak.and revers.l meas.rements

s.all Cycles.Property of s.me Cremer Rational Maps.and Polynomials

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Chines. Annals.of Mathematics.s.ries.b 2024年第1期45卷 123-136页

作者： Rong FU Ji zhou Faculty of s.ience Yibin UniversityYibin 644000SichuanChina department of Mathematical s.iences Sichuan Normal UniversityChengdu 610066China

This.paper concerns.the linearization problem on rational maps.of degree d≥2 and polynomials.of degree d>2 from the pers.ective of *** authors.introduce a s.t l_(∞) of irrational numbers.and s.ow that if α∈l_(∞),then any rational map is.not linearizable and has.infinitely many cycles.in every neighborhood of the fixed point with multiplier λ=e^(2πiα),Adding more cons.raints.to cubic polynomials.they dis.us. the above problems.by polynomial-lik. *** the family of polynomials.with the help of Yoccoz's.method,they obtain its.maximum dimens.on of the s.t in which the polynomials.are non-linearizable.

关键词： Irrationally indifferent fixed point Linearization problem s.all cycles.property